Symmetric Key Encryption in SQl Server and decryption in C#

hope everyone will be fine here. I have created a column with encrypted data using SQL Server Symmetric Key encryption feature. What I have done is attached in a file:

 

It has successfully Updated EncryptedPhone column with encrypted data (which is in varbinary).

Now the problem is that, I am using LINQToSQL on application and I am using inline Linq To SQL query (not stored procedure or sql query), I need to decrypt this data to view on the page. As you can see from the above database code, I am using TripleDES to create encrypted data. However I am unable to understand how can I achieve the decrypted data on C# which was encrypted through SQL query.